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Svetlanka [38]
3 years ago
5

Simplify 1 + 4.25n + 3/2p - 3 + (-2p) +5/4n

Mathematics
2 answers:
Alecsey [184]3 years ago
4 0
The actual answer is 5.5n-0.5p-4
RSB [31]3 years ago
3 0
The simplified expression of your question is

11n/2-p/2-2
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A metalworker has a metal alloy that is 30% copper and another alloy that is 65% copper. How many kilograms of each alloy should
LenKa [72]

Step-by-step explanation:

If x is the mass of 30% copper alloy, and y is the mass of 65% copper alloy, then:

x + y = 80

0.30x + 0.65y = 0.51(80)

Solving the system of equations using substitution:

0.30x + 0.65(80 − x) = 0.51(80)

0.30x + 52 − 0.65x = 40.8

11.2 = 0.35x

x = 32

y = 80 − x

y = 48

The metalworker needs 32 kg of 30% copper alloy and 48 kg of 65% copper alloy.

7 0
4 years ago
Which expression matches the words "the product of 12 and 4, then subtract 8
Rasek [7]
The answer is 8 because 12 plus 4 is 16, and then 16 minus 8 is 8
7 0
4 years ago
HEY CAN ANYONE HELP ME!
nataly862011 [7]

Answer:

Given: In triangle ABC and triangle DBE where DE is parallel to AC.

In ΔABC and ΔDBE

DE || AC   [Given]

As we know, a line that cuts across two or more parallel lines.  In the given figure, the line AB is a transversal.

Line segment  AB is transversal that intersects two parallel lines.  [Conclusion from statement 1.]

Corresponding angles theorem: two parallel lines are cut by a transversal, then the  corresponding angles are congruent.

then;

\angle BDE \cong \angle BAC  and

\angle BEC \cong \angle BCA

Reflexive property of equality states that if angles in geometric figures can be congruent to themselves.

by Reflexive property of equality:

\angle B \cong \angle B  

By AAA (Angle Angle Angle) similarity postulates states that all three pairs of corresponding angles are the same then, the triangles are similar

therefore, by AAA similarity postulates theorem

\triangle ABC \sim \triangle DBE

Similar triangles are triangles with equal corresponding angles and proportionate side.

then, we have;

\frac{BD}{BA}                  [By definition of similar triangles]

therefore, the missing statement and the reasons are

Statement                                                                   Reason

3.\angle BDE \cong \angle BAC      Corresponding angles theorem

and  \angle BEC \cong \angle BCA        

5. \triangle ABC \sim \triangle DBE   AAA similarity postulates    

6. BD over BA                                                    Definition of similar triangle



7 0
3 years ago
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Y=-3x+4 solved for y
Sauron [17]
Y= -3x+4   should be 0

7 0
3 years ago
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1. Which rule describes a translation that is 8 units to the right and 2 units up?
sineoko [7]
3rd one because it makes sense
7 0
3 years ago
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